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ADS-933MM Arkusz danych(PDF) 1 Page - Murata Power Solutions Inc. |
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ADS-933MM Arkusz danych(HTML) 1 Page - Murata Power Solutions Inc. |
1 / 8 page PIN FUNCTION PIN FUNCTION 1 +3.2V REF. OUT 40 NO CONNECTION 2 UNIPOLAR 39 NO CONNECTION 3 ANALOG INPUT 38 +5V ANALOG SUPPLY 4 ANALOG GROUND 37 –5V SUPPLY 5 OFFSET ADJUST 36 ANALOG GROUND 6 GAIN ADJUST 35 COMP. BITS 7 DIGITAL GROUND 34 OUTPUT ENABLE 8 FIFO/DIR 33 OVERFLOW 9 FIFO READ 32 EOC 10 FSTAT1 31 +5V DIGITAL SUPPLY 11 FSTAT2 30 DIGITAL GROUND 12 START CONVERT 29 BIT 1 (MSB) 13 BIT 16 (LSB) 28 BIT 1 (MSB) 14 BIT 15 27 BIT 2 15 BIT 14 26 BIT 3 16 BIT 13 25 BIT 4 17 BIT 12 24 BIT 5 18 BIT 11 23 BIT 6 19 BIT 10 22 BIT 7 20 BIT 9 21 BIT 8 FEATURES • 16-bit resolution • 3MHz sampling rate • Functionally complete • No missing codes over full military temperature range • Edge-triggered • ±5V supplies, 1.85 Watts • Small, 40-pin, ceramic TDIP • 85dB SNR, –84dB THD • Ideal for both time and frequency-domain applications 16-Bit, 3MHz Sampling A/D Converters ® ® INNOV A TION and EX CELLENCE GENERAL DESCRIPTION The low-cost ADS-933 is a 16-bit, 3MHz sampling A/D converter. This device accurately samples full-scale input signals up to Nyquist frequencies with no missing codes. The dynamic performance of the ADS-933 has been optimized to achieve a signal-to-noise ratio (SNR) of 85dB and a total harmonic distortion (THD) of –84dB. Packaged in a 40-pin TDIP, the functionally complete ADS-933 contains a fast-settling sample-hold amplifier, a subranging (two-pass) A/D converter, an internal reference, timing/control logic, and error-correction circuitry. Digital input and output levels are TTL. The ADS-933 only requires the rising edge of the start convert pulse to operate. Requiring only ±5V supplies, the ADS-933 dissipates 1.85 Watts. The device is offered with a bipolar (±2.75V) analog input range and a unipolar 0 to –5.5V input range. Models are available for use in either commercial (0 to +70°C) or military (– 55 to +125°C) operating temperature ranges. A proprietary, auto- calibrating, error-correcting circuit enables the device to achieve specified performance over the full military temperature range. Typical applications include medical imaging, radar, sonar, communications and instrumentation. INPUT/OUTPUT CONNECTIONS ADS-933 DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508) 339-6356 • E-mail: sales@datel.com • Internet: www.datel.com Figure 1. ADS-933 Functional Block Diagram PRELIMINARY PRODUCT DATA 29 BIT 1 (MSB) 28 BIT 1 (MSB) 27 BIT 2 26 BIT 3 25 BIT 4 24 BIT 5 23 BIT 6 22 BIT 7 21 BIT 8 20 BIT 9 19 BIT 10 18 BIT 11 17 BIT 12 16 BIT 13 15 BIT 14 14 BIT 15 13 BIT 16 (LSB) TIMING AND CONTROL LOGIC GAIN ADJUST 6 +3.2V REF. OUT 1 OFFSET ADJUST 5 EOC 32 +5V ANALOG SUPPLY 38 +5V DIGITAL SUPPLY 31 –5V SUPPLY 37 ANALOG GROUND 4, 36 DIGITAL GROUND 7, 30 NO CONNECTION 39, 40 POWER AND GROUNDING S/H GAIN ADJUST CKT. OFFSET ADJUST CKT. PRECISION +3.2V REFERENCE ANALOG INPUT 3 START CONVERT 12 COMP. BITS 35 10 FSTAT1 11 FSTAT2 8 FIFO/DIR 9 FIFO/READ 34 OUTPUT ENABLE 33 OVERFLOW UNIPOLAR 2 OFFSET ADJUST 5 |
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